Hectograph duplicating machine



June 18, 1929. v w, w s 1,717.865

HECTOGRAPH DUPLICATING MACHINE Filed March 1928 5 Sheets-Sheet June 18,1929- w. E. WILLIAMS HEQTOGRAPH DUPLICATING' MACHINE Fi led March 5.1928 3 Sheets-Sheet 2 June 18, 1929. w. E. WILLIAMS 1,717,865

HECTOGRAPH DUPLICATING MACHINE I Filed March 1928 3 Sheets-Sheet 3 M gwunw Patented June 18, 1929.

UNITED STATES 1,217,855 PATENT OFFICE.

WILLIAM ERASTUS WILLIAMS, OF WILMETTE, ILLINOIS, ASSIGNOR 'lO DITTO, IN-

CORPORATED, OF CHICAGO, ILLINOIS, A

CORPORATION OF WEST VIRGINIA.

HECTOGRAPH DUPLICATING MACHINE.

Application filed March 3,

My invention relates to that class of machines wherein a hectographgelatimzed pad in the form of a sheet is trained from one spindle at oneend of an impression bed to and over an impression bed and to and upon arewinding spindle at the other end of the bed and copies are made bylaying down the master copy on the impression bed and then by animpression carriage taking off dupl cate copies on the well knownhectograph pr1nc1- The object of my invention is to improve the detailedconstruction of the impression carriage and platen roll arrangement inlaying down the master and other cop es in an exact definite position ofregistration so that all copies will register with one another, afeature that is necessary in the commercial use of certain classes ofwork for which these machines are used. The particular object involvedin this invention is the means of registering the copy by the mechanismemployed in the impression carriage.

As this invention relates to details of the machine only, only so muchof the machine is shown as is necessary to illustrate the peculiarfeatures involved in this invention, the rest of the machine being oldand in common use.

Reference will be had to the accompanying drawings in which Fig. l is anend elevation partly in section on line 11 of Fig. 2.

Fig. 2 is a. plan view of the right front cor ner of the machine showingthe essential parts of my invention.

Fig. 3 is a sectional elevation on line 3-3 of 2.

Fig. 4 an elevation on the same line as that of Fig. 3 but showing theimpression or platen roll in a raised position Whereat the paper isinserted ready for an operation.

Fig. 5 is a similar view to that of Fig. 4 showing a position of theplaten roll when down.

Fig. 6 is a similar view to that of Fig. 5 but showing the parts inposition after the impression carriage is moved forward in laying downthe copy.

Fig. 7 is an end elevation to be described later on line 7*? of Fig. 5.

Fig. 8 is a similar view to that of Fig. 7 on line 88 of Fig. 6 butshowing the position of the parts as shown in Fig. 6.

In the drawings 1 indicates the frame of the machine being the rightfront end thereof and 2 indicates the impression bed over which 1928.Serial No. 258,837.

the gelatinized pad 3 is trained. 4 indicates one of the spindles uponwhich the gelatin pad is wound. An impression carriage the frame ofwhich is indicated by 5 is connected to a block 6 sliding on a bar 7mounted on the side of the machine (see Fig. 2).

This bar 7 through the medium of the block 6 directs the travel of thecarriage out and back over the impression bed. Mounted in the impressioncarriage frame there is a yoke 8 hinged upon the rod 9 in the frame ofthe carriage and moved in a rocking motion by the hand lever 10. At theends of the yoke 8 there are arms 11 into which is mounted the shaft 12of a rubber-faced impression or platen roll 13 which is raised andlowered by the rocking of the yoke 8. Fixed in the im pression carriageframe there is a paper guide 1 1- which is provided with end flanges 15.A lateral guide (not shown) is provided for adjusting the paper sidewiseon guide 14. These guides direct the paper 16 down to and in contactwith the margin bar 17 (see Fig. 4) Mounted also in the carriage framethere is a compression or clamping roller 18 journaled at its ends inlittle blocks 19 hinged at 20 inthe carriage frame. The clamping orcompression roller 18 is automatically pushed toward a platen roll 13 bylittle springs 21 and this movement is arrested at the right position bylittle pins 22 hitting a projection 23 on the impression carriage frame(see Fig. 3). Thus the clamping or'compression roll 22 is always underthe control of the springs 21 save only when the said roll is locked orheld back by a lever mechanism now to be described.

At each end of the compression roll 18 there is connected to the blocks19 short links 2 1 hinged at 25 to levers 26 fixed on the shaft 27mounted to the carriage frame. The lever 26 at the left end of thecarriage which is not shown extends only from the hinge pin 25 to theshaft 27, the shaft 27 extending entirely across the carriage, while thelever at the right end of the machine has an upward extending arm 28hinged at 29 to a peculiarly shaped link 30 which is provided with aslot 31 engaged by a pin 32 in a little angle block 33 fixed by screws34 to the aforementioned yoke 8 (see Fig. 4).

Thus, as the yoke is rocked backward from the position of Figs. 1, 3 or6 the pin 32 moving with the yoke 8 pulls the link 30 backward to theposition indicated by Fig. 4 and then on a slight further movementcauses the link to drop down to the position of Fig. 5 wherein aprojection on the link 30 drops in behind a projection 36 of a lever arm37 which lever arm 37 is hinged to the carriage frame 38 and drops bygravity to the posi tion shown by Fig. 5 and in this position of Fig. 5the link 30 connected to the lever 28 controls the movement of the shaft27 to hold the compression or clamping roll 1.8 hack and away from theimpression roll 13 as shown by the positions of Figs. 4 and 5 and whilethe compression roll 18 is held backward in this position, the yoke 8 ismoved downward bringing the platen roll 13 from the position of Fig. 1to that of Fig. 5. Then on the forward movement of the carriage from theposition of Fig. 5 to the position of Fig. 6 the lever arm 37 throughthe medium of a block 39 hinged to the said arm 37 at to engages a roundpin 11 best observed in Fig. 2 which pin ll lifts the projections 36over and above the projection 35 which releases, as it were, the link 30that allows the springs 21 to press the compression roll 18 up incontact with the platen roll 13 as indicated by Fig. 6 and hold thepaper snug to the roll for the purpose of withdrawing the paper from thegelatin pad on the return movement of the carriage. Then when thecarriage returns the block 39 revolves over the projection 4.1 andpermits the relocking of the link at) on the lifting of the platen roll13 by the yoke 8 for a new action of the machine. The margin bar 17 isconnected to links 42 hinged at 4:3 to the frame of the machine.

Thus, when the paper is inserted onto the margin bar 17 the compressionroll 18 is free away from the platen roll 13 and the paper is permittedto sink or be pressed down onto the gelatin pad without interference bythe compression roll 18 and thus the paper automatically, as it were,remains in registration against the margin bar 17 which would not be thecase were the impression roll in position to be contacted with the paperand the platen roll when the platen roll descends for in that case thefrictional contact of the platen roll with the compression roll revolvesthe platen roll slightly and withdraws and disturbs the register of thepaper with the margin bar 17. This error varies with the character andthickness of the paper but by holding the compression roll away from theplaten roll free and clear during the period of registering the paper inthe first contact with the gelatin pad, then the registration is notdisturbed by the coming of the contact of the compression roll 18 to thepaper and holding it to the rubber faced platen roll 13.

The function of the compression or clamping roll18 is in withdrawing thepaper from the gelatin pad and not in laying it down and thus only onthe return stroke of the carriage is it necessary to have thecompression or clamping roll 18 in contact with the platen roll 13. Thiscontact automatically takes place on the slight movement forward of thecarriage, after the paper is laid down as shown by Fig. 5 the distancebeing only that distance between the position of the block 39 from thepin 4.1 which pin ll is substantially on the center of the hinge pins 43of the arm 42 which supports the margin bar 17.

Thus by the simple mechanism of holding back the compression roll freeand away from the platen roll during the registering of the paper andthen allowing this roll to come in contact with the platen roll afterregistration is made, the full and complete function of the machine isarrived at without other means for securing the registration of thepaper in the desired position on the gelatin pad.

What I claim is 2 1. In a machine of the class described, a bed, acarriage mounted to be moved backward and forward over the bed, a yokemounted in the said carriage on a hinge pin axis, a platen roll mountedin the said carriage and adapted to be swung to and from the said bed, acompression roll. adapted to clamp paper to the said platen roll whenthe said platen roll is down in relation to the said bed, spring meansfor clamping the said compression roll to the said platen roll, meansfor locking the said compression roll free and. clear of said platenroll, and said locking means engaged by the movement of the said yoke,means fixed to the bed of the machine for disengaging the said lockingmeans as the said carriage is moved outward from registering'position ofthe said carriage.

2. In a machine of the class described, a bed, an impression carriagemounted to travel forward and backward over the said bed,.a platen rollmounted in the said carriage in a manner to be raised and lowered inrelation to the said bed, a compression roll adapted to clamp paper tothe said platen roll when the latter is down in the function of layingthe paper on and taking it off from the said bed, spring means forholding the said compression roll in connection with the said platenroll, a locking device for looking thesaid compression roll in aposition backward and away from the said platen roll and said lockingdevice engaged by the upward movement of the platen roll and disengagedby the forward movement of the carriage.

3. In a machine of the class described,.a bed, an impression carriagemounted to travel backward and forward over the said bed in applyingpaper thereon and withdrawing it therefrom, a platen roll mounted to beraised and lowered in the said carriage fro-m and to the said impressionbed, a compression roll adapted to clamp paper to the said platen rolland said compression roll mounted in the said carriage to move to andfrom the said platen roll, a rocker shaft extending across the saidcarriage and supplied with lever arms connected by links to control themovement of the said compression roll, a link connection from the saidrocker shaft to the mounting of the said platen roll whereby on theraising of the platen roll, the said compression roll is moved backwardand away from the region of the said platen roll and locking means forholding the said rocker shaft to hold the said compression roll in thesaid position away from the said platen roll.

4. In a machine of the class described, an impression bed, an impressioncarriage mounted to move backward and forward over the said bed, a yokehinged in the said carriage and adapted to be rocked in a vibratingmovement, a platen roll carried by the said yoke, a compression rolljonrnaled in arms hinged in the said carriage and adapted to be swung toand from contact with the said platen roll and held in engagementtherewith by means of a spring tension, a rocker shaft mounted acrossthe said carriage and provided with arms connected by links to move thesaid compression roll, a link connection between the said rocker shaftand the said yoke whereby on the lifting of the said platen roll by thesaid yoke the said compression roll is moved away from the said platenroll, means for locking the said rocker shaft in position to hold thesaid compression roll away from the said platen roll and means fordisengaging the said locking mechanism and this disengaging means fixedto the bed frame of the machine and adapted to unlock the said lockingmeans as the said compression carriage is moved forward away from theregistering position of the said carriage.

5. In a machine of the class described, an impression bed, an impressioncarriage mounted to be moved forward and backward over the bed in layingpaper down thereon and withdrawing it therefrom, a yoke hin 'ed in thesaid carriage, a platen roll mounted in the said yoke and adapted to beraised and lowered through the medium of the said yoke in relation tothe bed, a compression roll mounted in the said carriage and adapted tobe swung to and from the position of the said platen roll when thelatter is down, a rocker shaft connected to draw the said compressionroll to hold it away from the said platen roll and springs adapted tocompress the said said rocker shafts to the said yoke, a locking meansadapted to engage the said link connection and hold it to a givenposition and said locking means hinged to the said carriage and providedwith a contact member adapted to engage a projection on the said bed inthe forward movement of the carriage and ride over the said projectionon the backward movement of the carriage.

6; In a machine of the class described, a bed, an impression carriagemounted to be moved outward and back over the said bed, a yoke mountedin the said carriage and a platen roll mounted in the said yoke andadapted to be raised and lowered by means of the said yoke in relationto the said bed, a compression roll mounted in the said carriage andadapted to clamp or compress paper to the said platen roll whenthelatter is down in service on the said bed, spring means for actuatingthe said compression roll in clamping the paper to the said platen roll,a rocker shaft hinged in the said carriage and connected by links to thesaid compression roll mounting in a manner that the rocking of therocker shaft withdraws the said compression roll from the said platenroll and compresses the said springs which actuate the said compressionroll, a link connection connecting the said rocker shaft with the saidyoke and said link connection being provided with a slotted link wherebyon the raising of the said platen roll through the medium of the saidyoke the said compression roll will be moved away from the said platenroll, locking means for holding the said rocker shaft to hold the saidcompression roll away from the said platen roll and the said slottedlink connection permitting the said yoke to move the said platen rolldown to service on the said bed without unlocking the said locking meansand the said locking means unlocked by a projection on the bed as thecarriage is moved forward in the service of laying on the paper.

Signed at Chicago, in the county of Cook and State of Illinois, this28th day of February, 1928.

WILLIAM ERASTUS WILLIAMS.

